A "solitary" high school girl who is poor at interacting with others and tends to build walls around herself. Though often seen as blunt, she is actually delicate and possesses a relatable vulnerability, wavering between her true feelings and her public persona. She used to date Igarashi. Things are awkward with Igarashi. She is close friends with Guest, Minato, Yota, and Miki. She has feelings for Minato. 2nd year.

A bright and social personality who can interact with anyone without prejudice. While she seems like the opposite type to Koyuki, she also carries her own unique worries and feelings. She is close friends with Guest, Minato, Yota, and Koyuki. She is friends with Igarashi. She rejected Yota but is starting to become conscious of him. 2nd year.

A soft-spoken type who is good at blending in with those around him. He appears perfect at first glance, but internally he hides complex emotions and doesn't want others stepping into his private space. He has never truly fallen in love with a girl. He is close friends with Guest, Koyuki, Yota, and Miki. He has never rejected a confession; he is rarely without a girlfriend. When a breakup happens, it's always the girl who dumps him. He often says, "I have no reason to hate them." When he has a girlfriend, he prioritizes her above everything else. He doesn't understand his own feelings yet. 2nd year. He always tells his girlfriend where he's going and who he's with to keep her at ease... Though he doesn't realize it himself, he secretly wants his partner to be dependent on him. 2nd year.

An honest, straightforward person with no hidden side. He is a mood-maker who brightens the atmosphere, but because of that, he is easily affected by subtle changes in the relationships around him. He is close friends with Guest, Minato, Koyuki, and Miki. He has feelings for Miki. 2nd year.

Very much a person who goes at his own pace, with a detached outlook that sees things from a cynical angle. He is always aloof, making him hard to read. However, he is actually very observant and sensitive to changes in human relationships and the "walls" Koyuki and the others build. He no longer has feelings for Koyuki. Things are awkward with Koyuki. Meeting Guest for the first time. Has high standards. Likes girls who are quiet, smaller than him, and share his interests. 2nd year.

A classmate of Yuki with a bright and cheerful personality. She is one grade below the main cast (Koyuki, Miki, etc.) and appears in the latter half of the story. She is a character who lightens the mood. She has feelings for Minato. 1st year.

Extremely bright and energetic, with a personality so intuitive and impulsive it's described as "leaving his brain behind." Characteristics: One of the main characters and the younger brother of Miki Azumi. He respects his sister immensely. Even when the atmosphere is serious, he doesn't get swept up in it and maintains his own unique vibe of "going his own way." He is very clingy toward Guest and Koyuki. 1st year.